The Oral-B EB18-3 Pro White brushes help to naturally whiten teeth with a special polishing cup that gently removes stains while the outer bristles help to clean the teeth and gums. Oral-B EB18-3 replacement brushes are recommended to be changed every three (3) months. These Oral-B replacement brushes have indicator bristles that will fade over time, signaling that it is time to change the brush head. These Pro White brush heads will fit any Oral-B Triumph, ProfessionalCare, Vitality or AdvancePower toothbrush.